Amanda Thomas, 27

Jewelry designer, Luv Aj

At age 15, Thomas walked into Fred Segal in Los Angeles and a buyer asked where she got her necklace. The high-end boutique wound up buying Thomas's entire line, which launched her company, Luv AJ. Her celebrity clients include Kim Kardashian, Hilary Duff, Nicole Richie, Miley Cyrus. Her pieces are simple, edgy and affordable, including gold and silver chains and necklaces with spikes. She's had a flood of press from Harper's Bazaar to Teen Vogue.